Objectives Overview

Living in a Digital World

Discovering Computers 2010

Objectives Overview

Discovering Computers 2010: Living in a Digital World Chapter 5

2See 57 for Detailed Objectives

Objectives Overview


3See Page 257 for Detailed Objectives

What Is Input?

• Input is any data and instructions entered into the memory of a computer


4Pages 258 – 259 Figure 5-1

What Is Input?


5Pages 258 - 259

• Instructions can be entered into the computer in the form of programs, commands, and user responses

What Are Input Devices


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The Keyboard

• A keyboard is an input device that contains keys users press to enter data and instructions into a computer


7Page 560 Figure 5-2

The Keyboard


8Pages 260 - 261

• Most desktop computer keyboards have…

The Keyboard

• The insertion point, also known as the cursor, is a symbol on the screen that indicates where the next character you type will appear



The Keyboard


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The Keyboard

• An ergonomic keyboard has a design that reduces the chance of wrist and hand injuries

• Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace



Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Ergonomics below Chapter 5

The Keyboard

• Keyboards on mobile devices typically are smaller and/or have fewer keys

• Some phones have predictive text input, which saves time when entering text using the phone’s keypad


12Pages 262 – 263 Figure 5-5

Pointing Devices


13Page 263

Mouse

• A mouse is a pointing device that fits under the palm of your hand comfortably– Most widely used pointing device on desktop

computers

• A mouse can be wired or wireless


14Pages 263 – 264 Figures 5-6 and 5-7


15Page 264Figure 5-8

Other Pointing Devices


16Pages 265 – 266 Figures 5-9 – 5-11

Touch Screens and Touch-Sensitive Pads

• A touch screen is a touch-sensitive display device


17Page 266 Figures 5-12 – 5-13

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Multi-Touch Screensbelow Chapter 5

Touch Screens and Touch-Sensitive Pads

Microsoft Surface Touch-sensitive pads


18Page 267 Figures 5-14 – 5-15

Pen Input

• With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections



Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Signature Capture Pads below Chapter 5

Other Input for Smart Phones


20Page 269 Figures 5-17 – 5-18

Game Controllers

• Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects


21Page 270

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Wii Remote below Chapter 5

Game Controllers



Digital Cameras

• A digital camera is a mobile device that allows users to take pictures and store them digitally


23Page 272

Digital Cameras



Digital Cameras

• Two factors affect the quality of digital camera photos:


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Voice Input

• Voice input is the process of entering input by speaking into a microphone

• Voice recognition is the computer’s capability of distinguishing spoken words



Voice Input

• Audio input is the process of entering any sound into the computer


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Voice Input

• Music production software allows users to record, compose, mix, and edit music and sounds



Video Input

• Video input is the process of capturing full-motion images and storing them on a computer’s storage medium


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Video Input



Video: Video Editing on Your Computer


31

CLICK TO START

Video Input

• A Web cam is a type of digital video camera that enables a user to:


32Pages 275 - 276

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Web Camsbelow Chapter 5

Video Input

• A video conference is a meeting between two or more geographically separated people


33Pages 276 – 277 Figures 5-25 – 5-26

Scanners and Reading Devices




• Optical character recognition (OCR) involves reading characters from ordinary documents

• A turnaround document is a document you return to the company that creates and sends it


36Page 279 Figures 5-29 – 5-30


• Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles

• An OMR device scans the documents and matches the patterns of light




• A bar code reader, also called a bar code scanner uses laser beams to read bar codes



Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Bar Code Readersbelow Chapter 5


• RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object

• An RFID reader reads information on the tag via radio waves • RFID can track:


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• Magnetic stripe card readers read the magnetic stripe on the back of cards such as:




• MICR (magnetic ink character recognition) devices read text printed with magnetized ink

• An MICR reader converts MICR characters into a form the computer can process

• Banking industry uses MICR for check processing




• Data collection devices obtain data directly at the location where the transaction or event takes place

• Used in:– Restaurants– Grocery stores– Factories– Warehouses– The outdoors



Biometric Input

• Biometrics authenticates a person’s identity by verifying a personal characteristic


43Pages 282 - 283

Biometric Input


44Pages 282 – 283Figures 5-37 – 5-39

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Biometric Inputbelow Chapter 5

fingerprint reader

hand geometry

system

iris recognition

system

Terminals

• A terminal is a computer that allows users to send data to and/or receive information from a host computer


45Pages 284 – 285Figures 5-40 – 5-42

Putting It All Together



Input Devices for Physically Challenged Users

• Several input devices are available to assist physically challenged users:


49Page 286

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Gesture Recognitionbelow Chapter 5

Input Devices for Physically Challenged Users

Keyboard with larger keys Head-mounted pointer


50Page 286 Figures 5-44 – 5-45

Summary


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Living in a Digital World

Discovering Computers 2010

Chapter 5 Complete

Objectives Overview

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Transcript of Objectives Overview